/**
 * Copyright (c) 2002-2017 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.neo4j.driver.internal;

import org.neo4j.driver.v1.Session;

public class Version
{
    /**
     * Extracts the driver version from the driver jar MANIFEST.MF file.
     */
    public static String driverVersion()
    {
        // "Session" is arbitrary - the only thing that matters is that the class we use here is in the
        // 'org.neo4j.driver' package, because that is where the jar manifest specifies the version.
        // This is done as part of the build, adding a MANIFEST.MF file to the generated jarfile.
        Package pkg = Session.class.getPackage();
        if(pkg != null && pkg.getImplementationVersion() != null)
        {
            return pkg.getImplementationVersion();
        }

        // If there is no version, we're not running from a jar file, but from raw compiled class files.
        // This should only happen during development, so call the version 'dev'.
        return "dev";
    }
}
